Hankard Peter K, Bundy Jacob G, Spurgeon David J, Weeks Jason M, Wright Julian, Weinberg Claire, Svendsen Claus
Centre for Ecology and Hydrology, Monks Wood, Abbots Ripton, Huntingdon PE28 2LS, UK.
Environ Pollut. 2005 Jan;133(2):199-211. doi: 10.1016/j.envpol.2004.06.008.
Potential contamination at ex-industrial sites means that, prior to change of use, it will be necessary to quantify the extent of risks to potential receptors. To assess ecological hazards, it is often suggested to use biological assessment to augment chemical analyses. Here we investigate the potential of a commonly recommended bioassay, the earthworm reproduction test, to assess the status of urban contaminated soils. Sample points at all study sites had contaminant concentrations above the Dutch soil criteria Target Values. In some cases, the relevant Intervention Values were exceeded. Earthworm survival at most points was high, but reproduction differed significantly in soil from separate patches on the same site. When the interrelationships between soil parameters and reproduction were studied, it was not possible to create a good model of site soil toxicity based on single or even multiple chemical measurements of the soils. We thus conclude that chemical analysis alone is not sufficient to characterize soil quality and confirms the value of biological assays for risk assessment of potentially contaminated soils.
前工业场地存在潜在污染，这意味着在改变用途之前，有必要对潜在受体的风险程度进行量化。为评估生态危害，人们常建议采用生物评估来辅助化学分析。在此，我们研究了一种常用的生物测定方法——蚯蚓繁殖试验评估城市污染土壤状况的潜力。所有研究地点的采样点污染物浓度均高于荷兰土壤标准目标值。在某些情况下，还超过了相关的干预值。大多数采样点的蚯蚓存活率较高，但同一场地不同地块土壤中的蚯蚓繁殖情况差异显著。在研究土壤参数与繁殖之间的相互关系时，无法基于对土壤的单次甚至多次化学测量建立一个良好的场地土壤毒性模型。因此，我们得出结论，仅靠化学分析不足以表征土壤质量，并证实了生物测定在潜在污染土壤风险评估中的价值。
